Transparent Serial Bridge for Renesas FDT using Python, PyQt5 and com0com

Transparent Serial Bridge for Renesas FDT using Python, PyQt5 and com0com Project Summary I created a working software bridge that enables Renesas FDT (Flash Development Toolkit) to communicate through a virtual COM port, while the actual hardware communication is redirected to a physical serial port (UART). This makes it possible to use FDT with modern PCs where only virtual ports are visible or COM mapping is required R5Fxxxx (R8C) MODE3 -RealPort - data manipulation - VirtualComPort-MODE2 (FTD) MODE3- Reset MODE Vdd Vss - MODE2-Reset Rx Tx Vdd Vss Dependencies: - PyQt5 - pyserial - com0com - Windows + Admin rights https://github.com/Shema71/Shema71FDT.git Final Notes: This solution is ideal for development, testing, or programming Renesas MCUs on modern systems without legacy serial ports. The echo suppression ensures clean data flow into FDT even when using TX/RX shorted configurations (as required by Renesas boot mode). Everything is handled in software, no drivers or kernel hacks needed.